Re: [discussion]sched: a rough proposal to enable power saving in scheduler

On Thu, Aug 16, 2012 at 07:01:25AM -0700, Arjan van de Ven wrote:> > *Power policy*:> > > > So how is power policy different? As Peter says,'pack more than spread> > more'.> > this is ... a dubiously general statement.> > for good power, at least on Intel cpus, you want to spread. Parallelism is efficient.

Is this really true? In a two-socket system I'd have thought the benefit of keeping socket 1 in package C3 outweighed the cost of keeping socket 0 awake for slightly longer.